Metallic piston-packing



UNITED STATES PATENT oEEicE.

HENRY L. RUSSELL, OF HUDSON, `)IICILIIGi-XY.

METALLIC PISTON-PACKING.

Speccaton of Letters Patent No. 10,159, dated October 25, 1853.

T 0 all whom mag/ concern.'

Be it known that I, HENRY L. RUSSELL, of Hudson, in the county ofLenawee and State of Michigan, have invented a new and Improved MetallicPacking for the Cylin ders of Steam-Engines and for other Cylw inders inwhich a Tight Packing is Required; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, making a part of thisspecification, in which- Figure l, is a side view of the drum, whichcontains the levers for expanding the bands. Fig. 2, is an under View,or an inverted plan of the drum; showing the ring by which the leversare operated, and which is placed within the drum; and also showing thehub on which a ratchet is placed, and also the coil-spring, which isattached to the hub and to the ring above mentioned. The levers areshown by dotted lines in this view. Fig. 3, is a vertical section oi'the drum, bands, and ring; the plane of section being taken through thecenter; the coil spring and hub not being bisected. Fig. 4, is avertical section of a cylinder; showing the packing within it. Fig. 5,is a side view of the band, which fits over the drum. Fig. 6, and Fig.7, are side views of the bands which fit over the band shown in Fig. 5.Fig. 8, is a tace view of the plate, which is secured to the under sideof the drum. The ratchet and pawl are shown in this view.

Similar letters of reference indicate corresponding parts in each of theseveral figures.

This invention relates to a new and ilnproved metallic packing, for thecylinders of steamengines, and for other cylinders in which a tightpacking is required.

The invent-ion consists in expanding a number of metallic bands, bymeans of levers, secured in the periphery of a drum and operated bymeans of a ring, fitted within said drum and arranged as will behereafter shown.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A, represents a drum, closed at its upper end by a head, (c), whichprojects over the sides of the drum, and fits loosely within thecylinder for which the packing is in tended. The periphery of the drumis pierced with a number of oblong rectangular apertures, (5),' four ofthese apertures are shown in the drawings; in which apertures are placedlevers, B, having Shanks, (c), which project Sonie distance beyond theinner periphery of the drum, as shown by dotted lines in Fig. 2. Thelevers are secured in the periphery of the drum by pivots, (d), whichform the fulcrums of the levers. In the interior of the drum, A, thereis placed a ring, C, the outerl surface of which touches the innerperiphery of the drum. The periphery of the ring is pierced withapertures in which the Shanks, (c), of the levers, B, lit; this is shownby dotted lines in Fig. 2.

D, is a coil spring, placed within the ring, C. The outer end of thisspring is secured to the ring at, (e) see Figs. 2, and 3. The inner endof the said spring is secured at (f), to a hub, E, in the center of thering; as shown in Fig. 2. On the outer end of the hub, E, there is aratchet wheel, F, seen in Figs. 2, and 5.

G, is a plate, which is screwed to the lower end of the drum, A. Thisplate is of the same diameter as the head, (a), of the drum; see Fig. 4.At the center of the plate, Gr, there is a circular aperture, throughwhich the ratchet wheel, F, passes; and a pawl, (g), attached to theplate, G, catches into the teeth of the ratchet, as seen in Fig. 8.

H, in Fig. 5, is a metallic band, which lits around the drum, A. Thisband is cut, or divided, as shown in Fig. 5; and as is usual with allbands used in metallic packing in order to obtain the necessaryexpansion.

I, J, are two metallic bands, also cut, or divided, in the usual manner.These bands, I, J are placed over the band, H. The band H, is of thesame width as the drum, A; and the bands, I, J, are each one halt' thewidth ot' the band, H. y

The operation will readily be seen. By turning the hub, E, in thedirection of the arrow, in Figs. 2, and 8, the ring will be moved in acorresponding direction, as the ring is attached to the hub by the coilSpring, D. And as the Shanks, (c), of the levers, B, t in recesses inthe periphery of the ring, C, the outer ends of the said levers will bethrown out against the band, H, causing it and the two outer bands, I,J, to expand and iit tightly the bore of the cylinder, K, shown in Fig.4. The ring, C, is prevented from moving casually by means of the coilspring, D, pawl, (g), and ratchet, F. The hub, E, is turned by means ofa key which is fitted in a square recess, (h), in the center of theratchet.

By the above invention, the levers are made to operate alike at everypoint of bearing upon the packing. This packing is simple, and notliable to get out of repair, and does not necessarily require anexperienced hand I do not claim the metallic bands, H, I, J, for theyare now -used in metallic packing; but

Vhat I do claim as new, and desire to secure by Letters-Patent, is,-

Expanding the metallic bands, H, I, J, Which encompass the drum, A, bymeans of the levers, B, placed in the periphery of the drum, A, andoperated by means of the ring, C, Within the drum, as herein shown anddescribed; the ring, C, being prevented from moving casually, by meansof the coil spring, D, and ratchet, F, and pawl, (g), or theirequivalents.

v HENRY L. RUSSELL.

Witnesses:

JOHN CONGER, JACKSON M. VVooD.

